Tests/PrecompiledHeader/CMakeLists.txt

   1 cmake_minimum_required (VERSION 2.6)
   2 PROJECT(PrecompiledHeader C)
   3
   4 # Make sure the proper compiler is in use.
   5 IF(NOT MSVC)
   6   MESSAGE(FATAL_ERROR "The PrecompiledHeader test works only with MSVC")
   7 ENDIF(NOT MSVC)
   8
   9 # Compute a custom name for the precompiled header.
  10 IF(CMAKE_CONFIGURATION_TYPES)
  11   SET(PCH_DIR "${CMAKE_CURRENT_BINARY_DIR}/PCH/${CMAKE_CFG_INTDIR}")
  12 ELSE(CMAKE_CONFIGURATION_TYPES)
  13   SET(PCH_DIR "${CMAKE_CURRENT_BINARY_DIR}/PCH")
  14 ENDIF(CMAKE_CONFIGURATION_TYPES)
  15 FILE(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/PCH)
  16
  17 # The VS6 IDE does not support renaming .pch files with /Fp.
  18 IF("${CMAKE_GENERATOR}" MATCHES "Visual Studio 6")
  19   SET(PCH_USE_INCLUDE_DIR 1)
  20   SET(PCH_FILE)
  21 ELSE("${CMAKE_GENERATOR}" MATCHES "Visual Studio 6")
  22   SET(PCH_USE_INCLUDE_DIR 0)
  23   SET(PCH_FILE "\"/Fp${PCH_DIR}/foo_precompiled.pch\"")
  24 ENDIF("${CMAKE_GENERATOR}" MATCHES "Visual Studio 6")
  25
  26 # Choose between an explicit include path and using /I during
  27 # precompilation.  The /I form is used to test that the PCH is
  28 # actually used.  In practice the include path form would be used.
  29 IF(PCH_USE_INCLUDE_DIR)
  30   INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/include)
  31 ELSE(PCH_USE_INCLUDE_DIR)
  32   SET(PCH_INCLUDE_DIR "\"/I${CMAKE_CURRENT_SOURCE_DIR}/include\"")
  33 ENDIF(PCH_USE_INCLUDE_DIR)
  34
  35 # Create a target that will use a precompiled header.
  36 SET(foo_SRCS foo1.c foo2.c)
  37 ADD_EXECUTABLE(foo foo_precompile.c ${foo_SRCS})
  38
  39 # Setup flags on the target to create and use the precompiled header.
  40 SET_TARGET_PROPERTIES(foo PROPERTIES
  41   COMPILE_FLAGS "/Yufoo_precompiled.h /FIfoo_precompiled.h ${PCH_FILE}")
  42 SET_SOURCE_FILES_PROPERTIES(foo_precompile.c PROPERTIES
  43   COMPILE_FLAGS "/Ycfoo_precompiled.h ${PCH_INCLUDE_DIR}")
  44
  45 # Setup dependencies for precompiled header creation and use.  The VS
  46 # IDE takes care of this automatically.
  47 IF("${CMAKE_GENERATOR}" MATCHES "Makefile")
  48   # This source file creates the precompiled header as a side-effect.
  49   SET_SOURCE_FILES_PROPERTIES(foo_precompile.c PROPERTIES
  50     OBJECT_OUTPUTS "${PCH_DIR}/foo_precompiled.pch")
  51
  52   # These source files use the precompiled header.
  53   SET_SOURCE_FILES_PROPERTIES(${foo_SRCS} PROPERTIES
  54     OBJECT_DEPENDS "${PCH_DIR}/foo_precompiled.pch")
  55 ENDIF("${CMAKE_GENERATOR}" MATCHES "Makefile")